Would be great to know the primary tower you are locked to and also the secondary tower. In my situation I am exactly between 2 towers and signal changes based on direction wind blows. Thus i've been forced to use external directional antenna to lock to one tower so as not to get blocked. Would be great to not have to constantly worry its going to switch to another tower and get blocked.
According to AH T&C:
MTN FIXED WIRELESS SERVICES, ONCE ACTIVATED, WILL BE LIMITED TO LOCATIONS WITHIN COVERAGE OF THE CLOSEST ACTIVE TOWER WHICH IS PURPOSED FOR FIXED LTE SERVICE.CLIENTS WILL NOT BE ABLE TO USE THEIR DATA OUTSIDE OF THEIR FIXED LOCATION (WITHIN REASONABLE DISTANCE OF THE ACTIVATION AREA).
Would be good to know what is a reasonable distance?
I doubt that there are Fixed LTE towers that will conflict in that manner - MTN would have certainly picked this up in their testing.